"... a plate which lies on metal balls and thus
follows every impulse of the hand which lies flat on it; the plate has an
attachment by which the slightest movements are registered on a slowly moving
surface. If the arm is held in a loop which hangs from the ceiling, the hand
will still more easily follow the weakest impulse without our knowledge."more

"The galvanometer proposed by Deprez
and d'Arsonval is also defined as a mobile bobbin galvanometer and differs
from those with a mobile magnet in that it is based on the interaction between
a fixed magnet and a mobile circuit followed by the current being measured.
Among the advantages of this type of galvanometer is a higher sensitivity
based on the strong magnetic field inside the bobbin. From this galvanometer
are derived all mobile bobbin instruments, both portable and non-portable."

"This illustration, unfortunately, does not show the critical
connections, on the left, to the finger held in place by No. 388, and to the
right, over the pulley, down to the weight that is repeatedly lifted by finger
movement. The device, mainly, consists of a bristle holder which can write on a
kymograph drum. This device is described as having an advantage over No. 391
(not illustrated), in that it has a cord which runs on two pulleys, which
permits the writing apparatus to move in one direction to permit multiple
recordings on the same kymograph drum. The band which moves in one direction is
used to provide accumlulating measure of effort."

"Johannes Friedrich August von Esmarch. A narrow hard rubber tourniquet
with a chain fastener, used to control bleeding in tying off an
extremity in such a way that it is made bloodless, thus making it easier
to operate. 1873."
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"One common type of metronome is the wind-up
metronome, which uses a weight on the end of a rod to control the
tempo (slide the weight up the rod to decrease tempo, or down the
rod to increase tempo). The pendulum rod swings back and forth in
tempo; mechanics inside the metronome produce a clicking sound on
each swing of the rod."

"The patient is put in a relaxed, recumbent
position; he is asked to put himself into as comfortable a position
as possible, close his eyes, and attend to some monotonous stimulus
such as the regular beats of a metronome."

"Nernst lamps were an early form of
electrically-powered incandescent lamps. Nernst lamps didn't use a
glowing tungsten filament, however. Instead, they used a ceramic rod
that was heated to incandescence. Because the rod (unlike tungsten wire)
would not further oxidize when exposed to air, there was no need to
enclose it within a vacuum or noble gas environment; the burners in
Nernst lamps could operate exposed to the air and were only enclosed in
glass to aid in diffusing the light that was produced."

"The board is supported by two castors and a
pencil. When a person's fingers rest lightly on the board, it is supposed to
trace words or drawings without conscious direction from that person.
Spiritualists have used such devices to receive messages from the dead.

"Unscrew the knurled knob, insert the pencil
through knob, adjust the pencil to an equal length to the legs of the instrument
and screw down the cap. Place planchette on a large sheet of paper and rest your
hands lightly on the instrument, remaining perfectly passive and leaving it free
to write."

"A device for recording the rate and extent of
respiratory movements by means of a double-headed tambour stretched across the
individual's chest, with an attached rubber tube for communicating the
movements to a recording tambour."

"The sphygmograph
allowed physicians to measure the pulse, and most importantly, to record it.
Previously the pulse was measured by placing fingers on the wrist of the
patient and applying pressure. The sphygmograph was a first step in
standardizing the recording and evaluation of pulses using technology."
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